1 1/2 hours ago I was preparing stuff to clean out the Silkies' temporary cage but when I walked up to it, I saw that our Lavender was dead. She was fine an hour before so I'm not sure what caused her death. I'm really heartbroken as this is our 5th Silkie to die(Other 4 died a few months ago). The other 3 are doing fine and are actually very confused and freaked out. I put them in a large plastic tub so that I could clean out their cage. I put them back in the cage and they're currently sleeping as it's a half hour before 3am. I gave the other 3 some Corid directly just in case. They were actually getting corid in their water since Saturday. I at first thought parasites but I checked all Silkies and they're are clear of them, even their poo is clear of them. All Silkies are around 4 months old. What would cause a pullet to suddenly die? What should I check for?